2101954 has 4 divisors (see below), whose sum is σ = 3152934. Its totient is φ = 1050976.

The previous prime is 2101909. The next prime is 2101961. The reversal of 2101954 is 4591012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 950625 = 1073^2 + 975^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525487 + ... + 525490.

2^2101954 is an apocalyptic number.

2101954 is a deficient number, since it is larger than the sum of its proper divisors (1050980).

2101954 is a wasteful number, since it uses less digits than its factorization.

2101954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050979.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2101954 is about 1449.8117119130. The cubic root of 2101954 is about 128.0976224669.

Adding to 2101954 its reverse (4591012), we get a palindrome (6692966).

The spelling of 2101954 in words is "two million, one hundred one thousand, nine hundred fifty-four".